Helmet



FIG. 1 is a perspective view of a helmet showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof, the left side being a mirror image;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a section view taken along lines 7-7 in FIG. 1; and,

FIG. 8 is a section view taken along lines 8-8 in FIG. 1.

The faceguard shown in broken lines in FIG. 1 forms no part of the claimed design. 

CLAIM The ornamental design for a helmet, as shown and described. 